PSLE Sarah bought 2 fans of the same model at a sale. She paid $211.20 for them.
- What was the price of the fan before discount?
- Bobby also bought 2 such fans at the price before discount. How much more did Bobby pay than Sarah?
|
Fan 1 |
Fan 2 |
Total |
Before |
100% |
100% |
200% |
Change (Discount) |
- 10% |
- 70% |
|
After |
90% |
30% |
120% |
(a)
Amount that Sarah paid for the 2 fans in percent
= 90% + 30%
= 120%
120% → 211.20
1% → 211.20 ÷ 120 = 1.76
100% → 100 x 1.76 = $176
Price of the fan before discount = $176
(b)
Amount that Bobby paid more than Sarah
= 10% + 70%
= 80%
= 80 x 1.76
= $140.80
Answer(s): (a) $176; (b) $140.80